|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

08-20-2012, 06:42 PM
|
|
|
|
Join Date: Sep 2009
Location: Park City, Utah
Posts: 13
|
|
Windscreen fairing question
I've installed my windscreen using Sikaflex, the attachment is at the roll-bar and fuselage skin. I was wondering if instead of doing a fiberglass layup for the fairing between the windscreen and the fuselage if I could just use SUPER FIL. I've already used SUPER FIL to create the fillet between the windscreen and fuselage and it seems like it would be straight forward and easy to extend this to cover the complete windscreen to fuselage transition.
I will do a fiberglass layup for the fairing between the windscreen and the canopy.
Any one see any problems with this approach?
__________________
Karl Paulsen
RV7 - N485KP
TMX-IO360, Hartzell Prop, Dynon Skyview
Park City, UT
|

08-22-2012, 11:14 AM
|
|
|
|
Join Date: Aug 2010
Location: Eugene, OR
Posts: 159
|
|
My opinion
I am on this step at present. I used Sika to set the front plexi on, and to the roll bar. Next I used West 403 (sorta similar to superfil) to the transition, with three layers of fiberglass over this. I dyed both the 403 and the glass black. Next I built smooth contour with a thin topping of West 410 balloons. Next will be more glass, then pore filler/ primer.
I think this area needs fiberglass, not just superfil, IMHO
__________________
Steve McGirr
RV7 N1991M
First Flight: May 18, 2013
|

08-23-2012, 09:45 AM
|
|
|
|
Join Date: Sep 2009
Location: Park City, Utah
Posts: 13
|
|
Windscreen fairing
Thanks for the response Steve, I guess I'll do the layup per the plans.
__________________
Karl Paulsen
RV7 - N485KP
TMX-IO360, Hartzell Prop, Dynon Skyview
Park City, UT
|

11-24-2012, 08:40 PM
|
|
|
|
Join Date: Apr 2006
Location: Howell, MI
Posts: 297
|
|
Black dyed Fiberglass for windscreen fairing?
Quote "I am on this step at present. I used Sika to set the front plexi on, and to the roll bar. Next I used West 403 (sorta similar to superfil) to the transition, with three layers of fiberglass over this. I dyed both the 403 and the glass black. Next I built smooth contour with a thin topping of West 410 balloons. Next will be more glass, then pore filler/ primer."
I heard others do this and wondered why it is necessary when the fairing will be painted on the outside anyway? Also, how does one dye the glass cloth, or, do you only dye the epoxy with the epoxy mfg dye?
Jim
|

11-24-2012, 10:36 PM
|
|
|
|
Join Date: Jul 2009
Location: Petaluma, CA
Posts: 233
|
|
just did this
pigment added to one half of the epoxy mixture and well stirred turn the pot totally black.
Once it is all mixed in, add the hardener and mix well. You can then add it to your glass in either a wet layup, or wet out your cloth and apply. Your choice.
Dying the glass separately is not necessary. The result is a black layup when viewed from the inside.
After the layups are cured, sand your rough shape and you can fill the lows with polyester filler that is also dyed for any thin spots from your previous sanding.
__________________
Bill Mason
RV7 SB in construction
Avionics, Wiring, FWF, interior, and paint to go.
Last edited by instructor_bill : 11-24-2012 at 10:40 PM.
|

11-25-2012, 07:12 AM
|
|
|
|
Join Date: Mar 2009
Location: Grand Rapids, MI
Posts: 1,004
|
|
Just did it that way as well. I have a series of photos in my Picasa album below if you are interested. Just scroll about 3/4 of the way down.
Here is one of the photos of the layup, one change being I used carbon fiber instead of glass.

__________________
Paul K
West Michigan
Unfortunately in science, what you believe is irrelevant.
2020 donation made, exempt but worth every dime!
Last edited by Paul K : 11-25-2012 at 07:22 AM.
|

11-25-2012, 02:22 PM
|
|
|
|
Join Date: Nov 2005
Posts: 1,256
|
|
I thought carbon fiber against aluminum was a no-no?
__________________
Steve "Flying Scotsman"
Santa Clarita, CA
PP-ASEL, ASES, Instrument Airplane
RV-7A N660WS flying!
#8,000
|

11-25-2012, 03:16 PM
|
 |
|
|
Join Date: Jul 2007
Location: Molalla, Oregon
Posts: 955
|
|
I just did all this work a few months ago, too. It wasn't as bad as I had thought and the results are really great. I used fiberglass cloth and some black pigment in the epoxy mix. If you don't use black pigment, you won't like what you see from inside the canopy! I feel very secure knowing that the glass is in place holding the windscreen down. It ain't goin' nowhere.
I have a lot more pictures and details, starting here:
Canopy Fairing Fiberglass Work
|

11-25-2012, 03:40 PM
|
|
|
|
Join Date: Mar 2009
Location: Grand Rapids, MI
Posts: 1,004
|
|
Carbon fiber against aluminum is another one of those old beliefs without any proof! Also, if you do buy into that, remember that there is a layer of epoxy between the two anyway.
__________________
Paul K
West Michigan
Unfortunately in science, what you believe is irrelevant.
2020 donation made, exempt but worth every dime!
|

11-25-2012, 09:57 PM
|
|
|
|
Join Date: Nov 2005
Posts: 1,256
|
|
Quote:
Originally Posted by Paul K
Carbon fiber against aluminum is another one of those old beliefs without any proof! Also, if you do buy into that, remember that there is a layer of epoxy between the two anyway.
|
I don't think there isn't any proof...a quick search turns up numerous technical reports from military and NASA analyzing galvanic corrosion between carbon/graphite epoxy layups and various metals, including aluminum, steel and titanium.
Whether it's significant in our application, I can't tell, as I'm not a materials scientist. But there is definitely something worth exploring and understanding there before just charging ahead with it because it looks cool.
__________________
Steve "Flying Scotsman"
Santa Clarita, CA
PP-ASEL, ASES, Instrument Airplane
RV-7A N660WS flying!
#8,000
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 05:36 AM.
|